Re: [Tee-dev] [RFC v2 2/6] tee: enable support to register kernel memory

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 





On 7/30/19 7:23 AM, Sumit Garg wrote:

@@ -264,7 +266,17 @@ struct tee_shm *tee_shm_register(struct tee_context *ctx, unsigned long addr,
  		goto err;
  	}
- rc = get_user_pages_fast(start, num_pages, FOLL_WRITE, shm->pages);
+	if (flags & TEE_SHM_USER_MAPPED) {
+		rc = get_user_pages_fast(start, num_pages, FOLL_WRITE,
+					 shm->pages);
+	} else {
+		const struct kvec kiov = {
+			.iov_base = (void *)start,
+			.iov_len = PAGE_SIZE
+		};
+
+		rc = get_kernel_pages(&kiov, num_pages, 0, shm->pages);

Passing a single kvec struct is temporary I assume?  Because as currently
written this will only work with num_pages==1.

Stuart



[Index of Archives]     [Kernel Newbies]     [Security]     [Netfilter]     [Bugtraq]     [Linux FS]     [Yosemite Forum]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Samba]     [Video 4 Linux]     [Device Mapper]     [Linux Resources]

  Powered by Linux